Cement-worker&#39;s tool.



No. 867,819. E PATENTBD 00T, a', 1907.

F. w'. GRUNDMANN. CEMENT WQRKER'S TooL.

APPLIOATIQN FILED MAY 15, 1906.

2 Sannita-SHEET 1.,

.lNvENroR- FREDERICK W. GRuNDMnm ATTY-"s,

ns co., wxsumoron. n. c.

UNITED STATES PATENT oEEreE.

FREDERICK W. GRUNDMANN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO CRESCENT NOVELTY MANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

CEMENT-WORKERS TOOL.

Specification of Letters Patent.

Patented Oct. 8, 1907.

To all whom fit may concern.'

Be it known that I, FREDERICK W. GEUNDMANN, a citizen of the United States, and a resident of St. Louis, Missouri, have invented certain new and useful Improvements in Cement-Workers Tools, of which the following is a speciication containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in cement l0 workers tools, and the object of my invention is to construct a simple, inexpensive tool, which is used `by cement and granitoid workers for grooving and inishing off composition sidewalks.

A further object of my invention is to Construct a cement workers tool of sheets or plates of hardened metal, which are -pressed into the desired form, and which may be combined in different ways, so as to provide different forms of tools.

To the above purposes,-my invention-consists of certain novel features of construction and arrangement of parts, which will be hereinafter more fully set forth, pointed' out in my claims, and illustrated in the ac companying drawings, in whichz- Figure l is a perspective view of one of the principal forms of my improved tool; Fig. 2 is a vertical section taken on the line 22 of Fig. I; Fig. 3 is a vertical section analogous to Fig. 2, and showing a tool constructed of a single plate, and adapted for rounding ofi the corners of a concrete sidewalk, or curb, Fig. 4 is a detail section, in perspective, illustrating a modified form of the tool seen in Fig. 3; Fig. 5 is a perspective View of a grooving tool similar to the tool seen in Fig. l, and provided with a modified form of handle frame; Fig. G is a perspective view of a tool constructed of a single plate, and with the handle frames formed integral with the ends of said plate.

In the construction of my improved tool, I make use of plates l, of hardened sheet metal, such as steel, and by suitable means turn one edge of each plate downwardly on a short curve, as indicated by 2, so that the extreme lower edge 3 occupies a vertical plane at right angles to the plane occupied bythe body of the plate l. Both ends 4 of each plate l are bent upwardly on sharp curves, and in so doing the ends of the downwardly bent edges 3 are likewise curved upwardly.

In forming a tool for grooving cement and granitoid work, I take a pair of plates I, having their edges and ends properly bent, as described, and place the downwardly bent side edges of said plates together, and

5() thus a larger plate is formed, with a downwardly projecting rib extending longitudinally from one end of said plate to the other. Riveted to the top sides ofthe pair of plates so arranged are transversely disposed plates 5, with each of which is formed integral an upwardly projecting arm 6, and positioned between and fixed to 'the upper ends of these arms 6 is a handle 7. The tool thus formed is adapted to be used on all kinds of cement and granitoid work for the purpose of forming grooves, o r creases, therein, and said tool being constructed of hardened metal will resist wear and, as the plates are constructed of malleable sheets of metal, they will not break in falling on stone pavement, or by being struck by heavy tools and the like, as is the case where cast tools are made use of.

In constructing a tool used for rounding off corners of concrete pavements, and curbing, one of the plates l is made use of, and provided adjacent its ends with vertically extending arms 8, between the upper ends of which is arranged the handle 7, (see Fig. 3.) In some instances, the tool constructed of a single plate I is provided on its downwardly turned edge with a Vertically adjustable plate 9, in which is formed vertical slots, such as l0, and through which pass set screws, such as ll, the same entering vertically disposed projections, such as l2, which are integral with the lower ends ofthe extending arms 8. The plate 9 in this construction is adjustable vertically, and locked by means of the set screws Il, and thus provides a wide vertical face when the tool is being used in corners.

In Fig. 5 I have shown a tool constructed of two plates, the same being held together by a longitudinally disposed strap I3, which covers the groove between said plates, formed between the downwardly bent edges; and the ends I4 of this strap extend vertically upward, and fixed between the upper ends thereof is the handle 7.

In Fig. 6 I have shown a tool constructed of a single plate l, and integral with the upwardly bent ends thereof are upwardly extending arms l5, between which is xed the handle 7.

A tool of my improved construction is easily and cheaply manufactured, is simple, strong, and durable, is very light in weight and very effective in use in grooving and finishing off cement and granitoid work.

As anew article of manufacture, a cement workers tool, comprising a pair of sheet metal plates having smooth'bottom surfaces and having their meeting edges bent downwardly to form a longitudinally extending centrally disposed rib on the under side of the tool, both ends of which plates, together with the edges forming the ribs, being curved upwardly, means whereby the plates are rigidly connected, and a handle carried by the plate connecting means.

In testimony whereof, I have signed my name to this specication, in presence of two subscribing witnesses.

FREDERICK W. GRUNDMANN.

Witnesses:

M. I. SMITH, Euw. M. HARRINGTON. 

